boynton



N. A. BOYNTON.

Hot-Air Furnace.

.Patented Aug. 22, 1854. I

No. 11,545. m

UNITED STATES PATENT oFFIoE,

NATHANIEL A. BOYNTON, OF NEW YORK, N. Y.

HOT-AIR FURNACE.

Specification of Letters Patent No. 11,545, dated August 22, 1854.

To all whomz't may concern:

Beit known that I, N. A. BOYNTON, of the city, county, and State of New York, have invented certain new and useful Improvements in Air-Furnaces for Heating Buildings; and I do hereby declare the following to be a full and exact description thereof, reference being had to the accompanying drawing, in which i Figure 1, is a vertical section of the fur nace; Fig. 2, is a plan of the lower portion of the gas consuming chamber, with the side pipes, ring, and exit pipe from the point x m in Fig. 1, removed; Fig. 3, is aplan of the ring and exit pipes passing over the crown of the gas consuming chamber.

My improvements are made for the purpose of bringing together, in the most compact practicable form the largest amount of heatlng surface, consistent wlth convenlent construction and a free and constant passage of air over the heating surfaces in all parts of the furnace, and at the same time the parts are so arrangedas toshed all the ashes, soot, and other products of combustion that would otherwise tend to clog the pipes, back into the fire chamber, where all the combustible portions are consumed, and the rest pass off through the ash pit.

The construction is as follows: A fire chamber (a) of circular form, with an ash. pit (6) below, are made like many others now in ordinary use; above this fire chamber (a), and resting upon it is a dome shaped chamber (0), the sides of which are deeply corrugated; this chamber has a circular opening (0) at the top, and around, near its base, are six, more or less, openings, the number depending on the manufacturers views; these openings extend outward and upward in radial pipes (d) terminating in a horizontal aperture forming the joint :12; above this joint there is a ring (6), surrounding the dome below its top, on the under side of which are downwardprojections (e) forming the lower side of the ring into a series of arches, terminating in circular bases that just fit on to the top of (d) at w, over the highest pointof every other one of the arches, and midway between the joint m,

a curved pipe (f) extends up from the ring (6); the several pipes f) curve over the top of the dome, and oin 1n a hub or short enlarged central pipe (g), that just fits on to the opening (0) on the top of the dome above named; on the top ofthe hub (g) the exit smoke flue (h) fits. There is a puppet valve within the hub,which when on its seat, covers the opening (0) at the top of the dome (c); it is hung on the end of an arm (11), having its fulcrum (2' and is worked by a corresponding rod extending out through-the side of the furnace;

when this valve is open, there is a direct draft ofi through thetop of the dome; but when closed the gases, after reverberating,

and being consumed within the dome, are.

made to descend and pass ofi' through the apertures at the base ofthe dome, and thence upcircling in the ring (6), into and through the pipes (f), hub (g), and out at the exit pipe (h). The air enters the furnace inclosure of brick (not shown in the drawing) and when heated passes out in the ordinary way to the apartments to be heated.

Having thus fully described my improved furnace, what I claim therein as new, and for which I desire to secure Letters Patent, is-

1. The arrangement and construction of the dome and heating ring surrounding the same, combined by a. series of pipes opening into the base of the dome, and carrying the smoke up over the same as herein specified.

2. I also claim the construction and arrangement of the smoke pipes, so as to prevent the lodgment of dirt therein, and precipitate the same into the fire chamber, thereby preventing the clogging of said pipes.- j

3. I also claim the puppet valve cover, arranged and combined with the dome of the furnace, by which I insure a stopper at that point, not liable to the derangement of ordinary valves used for similar purposes.

N. A. BOYNTON. 

